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Pipe jacking construction method under sandy gravel geological conditions

A technology of geological conditions and construction methods, applied in the direction of pipeline laying and maintenance, pipes/pipe joints/fittings, mechanical equipment, etc., can solve problems such as difficulty in deviation correction, difficulty in jacking construction, and increased deviation, so as to reduce environmental pollution, Significant social and economic benefits, and the effect of saving land acquisition and demolition costs

Active Publication Date: 2020-08-07
BUILDING & MOUNTING ENG CO LTD NO 12 BUREAU MINIST OF RAILWAYS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Sand and pebble strata are often encountered during pipe jacking construction. The jacking construction in this stratum is far more difficult than in clay, silt and general sandy soil strata. During the jacking process, the deviation increases and the jacking force increases. , it is difficult to correct the deviation, and even serious pulping phenomenon occurs

Method used

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  • Pipe jacking construction method under sandy gravel geological conditions
  • Pipe jacking construction method under sandy gravel geological conditions
  • Pipe jacking construction method under sandy gravel geological conditions

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Embodiment Construction

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail in combination with the embodiments and accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. The technical solutions of the present invention will be described in detail below in conjunction with the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0036] This construction method mainly includes the following contents

[0037] 1. Process flow

[0038] Construction technology of pipe jacking engineering: surveying and setting out→excavation of working pit→reinforced concrete retaining wall→installation of pipe jacking equipment→pipe jacking→backfilling

[0039] 2. Operating process

[0040] 2.1 Measurement and setting ...

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Abstract

The invention discloses a pipe jacking construction method under sandy gravel geological conditions. The pipe jacking construction method comprises the following steps that the position of a working pit and the center position of the pit are determined, the excavation depth of each layer is controlled, and concrete is poured in time; earth excavation, form manufacturing, steel bar engineering, form installation and concrete engineering are sequentially carried out; pipeline jacking comprises processes of earth cutting, jacking, measuring and deviation rectifying, a jack is used for extending apickaxe to push a jacking pipe forwards under the condition that the back retreats from the ground, and jacking is started from the position, located on the guide rail, of the pipe joint until the pipe jacking section is completed; when one-time jacking cannot be carried out, the pipe jacking section is divided into two sections, and sectional jacking is carried out by adopting an intermediate jacking station relay jacking method; shear wedges are arranged in an intermediate jacking station; and backfilling is carried out. The method solves the problem of jacking force of the sandy gravel section jacking pipe.

Description

technical field [0001] The invention relates to the field of pipe jacking construction of underground water supply and drainage pipelines, in particular to a pipe jacking construction method under sand and pebble geological conditions. Background technique [0002] The pipe jacking construction technology of underground water supply and drainage pipes of municipal infrastructure has its unique advantages when passing through urban buildings, highways, deep buried and other difficult and complex construction conditions. The pipe jacking construction technology is especially suitable for the non-excavation burial of large and medium-sized pipes, and has comprehensive functions of economy, safety, environmental protection and high efficiency. [0003] Sand and pebble strata are often encountered during pipe jacking construction. Jacking construction in this stratum is far more difficult than in clay, silt and general sandy soil strata. During the jacking process, the deviation ...

Claims

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Application Information

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IPC IPC(8): F16L1/036
CPCF16L1/036
Inventor 田久英吕争魁王朝晖王美静闫晓敏张超李鑫代楠
Owner BUILDING & MOUNTING ENG CO LTD NO 12 BUREAU MINIST OF RAILWAYS
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